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Work Plan for Environmental Investigation May 18, 1989 <br /> Proposed ARCO Station Woodbridge, California AGS 39044-1W <br /> remaining annulus will be backfilled with a slurry of cement, <br /> water, and bentonite powder to grade. <br /> Monitoring wells will be protected with cast-aluminum utility <br /> boxes equipped with PVC skirts. These utility boxes will be <br /> installed flush with the surface grade. These boxes have - <br /> watertight seals to protect against surface-water infiltration <br /> and must be opened with a special-wrench. This design <br /> discourages vandalism and reduces the possibility of accidental <br /> disturbance of the well. <br /> GROUND-WATER SAMPLING <br /> Water samples will be collected for subjective analysis before <br /> purging and developing monitoring wells. - A sample will be <br /> collected from the ground-water surface in each well with a <br /> Teflon bailer cleaned with Alconox and deionized water. Any <br /> subjective evidence of product detected in the well will be <br /> recorded. If no floating product is detected, the wells will be <br /> developed and purged, and ground-water samples will be collected <br /> for laboratory analysis. <br /> 14 <br /> Applied GeoSYSAMS <br />